Sec Form 4 Filing - Estes Phillip S. @ Malibu Boats, Inc. - 2018-09-14

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Estes Phillip S. 2. Issuer Name and Ticker or Trading Symbol Malibu Boats, Inc. [ MBUU] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 5075 KIMBERLY WAY 3. Date of Earliest Transaction (MM/DD/YY) 09/14/2018 (Street) LOUDON, TN37774 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Class A Common Stock 09/14/2018 C( 1 )( 2 ) 80,000 A $ 0 80,000 I See Footnote ( 3 ) Class A Common Stock 09/14/2018 S 80,000 D $ 52.87 ( 4 ) 0 I See Footnote ( 3 ) Class A Common Stock 28,298 D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Units of Malibu Boats Holdings, LLC ( 2 ) 09/14/2018 C( 1 ) 80,000 ( 2 ) ( 2 ) Class A Common Stock 80,000 $ 0 520,000 I See Footnote ( 3 ) Units of Malibu Boats Holdings, LLC ( 2 ) ( 2 ) ( 2 ) Class A Common Stock 23,637 23,637 I See Footnote ( 5 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Estes Phillip S. 5075 KIMBERLY WAY LOUDON, TN37774 X Signatures PHILLIP S. ESTES, /s/ Wayne Wilson as attorney-in-fact 09/18/2018 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The reporting person exchanged LLC Units for the equivalent number of shares of Malibu Boats, Inc.'s (the "Issuer") Class A Common Stock in accordance with the terms of the exchange agreement. ( 2 )Pursuant to the terms of exchange agreements between the Issuer and holders of limited liability company interests of Malibu Boats Holdings, LLC (the "LLC Units"), a holder of LLC Units has the right to exchange LLC Units for shares of the Issuer's Class A Common Stock on a one-for-one basis, subject to customary conversion rate adjustments for stock splits, stock dividends and reclassifications, or at the Issuer's option, other than in the event of a change in control, for a cash payment equal to the market value of the LLC Units. The LLC Units have no expiration date. ( 3 )The amount shown represents the beneficial ownership of Class A Common Stock and LLC Units, as applicable, owned directly by Horizon Holdings, LLC. Mr. Estes and Mr. James Shorin share the voting power and dispositive power with respect to the securities beneficially owned by Horizon Holdings, LLC and may be deemed the beneficial owner of the securities beneficially owned by Horizon Holdings, LLC. Mr. Estes disclaims beneficial ownership of such securities, except to the extent of his pecuniary interest therein, if any, in those securities. ( 4 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $52.50 to $53.30, inclusive. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. ( 5 )The amount shown represents the beneficial ownership of LLC Units owned directly by Malibu Holdings, L.P. Horizon Holdings, LLC is the general partner of Malibu Holdings, L.P. and may be deemed the beneficial owner of the securities beneficially owned by Malibu Holdings, L.P. Mr. Estes and Mr. James Shorin share the voting power and dispositive power with respect to the securities beneficially owned by Malibu Holdings, L.P. and may be deemed the beneficial owner of the securities beneficially owned by Malibu Holdings, L.P. Mr. Estes disclaims beneficial ownership of such securities, except to the extent of his pecuniary interest therein, if any, in those securities.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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